Gesture Input Device, Gesture Input Method, and Program

1. A gesture input device, comprising: circuitry configured to receive image information of an object, which is capable of forming a plurality of shapes, detect which of the plurality of shapes is being formed by the object included in the image information, determine one or more candidate gestures based on the detected one of the plurality of shapes being formed by the object, and control notification of an action to be performed next to input each of at least one of the one or more candidate gestures, wherein at least one of the one or more candidate gestures includes two or more sub gestures, and the circuitry is further configured to recognize a first sub gesture based on a detected action performed by the object, predict one or more candidate sub gestures to be input next based on a recognition result of the first sub gesture, and control notification of an action to be performed next to input each of the at least one of the one or more candidate sub gestures.

2. The gesture input device according to claim 1 , wherein a transition probability between the sub gesture and the one or more candidate sub gestures is calculated, and the circuitry controls notification of the action to be performed next so that each candidate sub gesture can be discriminated according to a transition probability between an immediately previously input sub gesture and the one or more candidate sub gestures to be input next.

3. The gesture input device according to claim 1 , wherein an input frequency of each gesture is recorded, and the circuitry controls notification of the action to be performed next so that each gesture can be discriminated according to an input frequency of each gesture included in the one or more candidate gestures.

4. A gesture input method of an information processing apparatus, comprising: receiving image information of an object, which is capable of forming a plurality of shapes; detecting which of the plurality of shapes is being formed by the object included in the image information; determining, by circuitry of the information processing apparatus, one or more candidate gestures based on the detected one of the plurality of shapes being formed by the object; and notifying of an action to be performed next to input each of at least one of the one or more candidate gestures, wherein at least one of the one or more candidate gestures includes two or more sub gestures, and the method further includes recognizing a first sub gesture based on a detected action performed by the object, predicting one or more candidate sub gestures to be input next based on a recognition result of the first sub gesture, and controlling notification of an action to be performed next to input each of the at least one of the one or more candidate sub gestures.

5. A non-transitory computer readable recording medium encoded with a program for causing a computer to execute a gesture input method, the method comprising: receiving image information of an object, which is capable of forming a plurality of shapes; detecting which of the plurality of shapes is being formed by the object included in the image information; determining, by the computer, one or more candidate gestures based on the detected one of the plurality of shapes being formed by the object; and notifying of an action to be performed next to input each of at least one of the one or more candidate gestures, wherein at least one of the one or more candidate gestures includes two or more sub gestures, and the method further includes recognizing a first sub gesture based on a detected action performed by the object, predicting one or more candidate sub gestures to be input next based on a recognition result of the first sub gesture, and controlling notification of an action to be performed next to input each of the at least one of the one or more candidate sub gestures.

6. The gesture input device according to claim 1 , wherein the object is a hand.

7. The gesture input device according to claim 1 , wherein the circuitry is further configured to control notification of a plurality of different actions to be performed next, each of the plurality of different actions corresponding to a different one of the one or more candidate gestures.

8. The gesture input device according to claim 1 , wherein the circuitry is further configured to detect an action being performed by the object and determine the one or more candidate gestures based on the detected one of the plurality of shapes being formed, and the action being performed, by the object.